TABLE 3.
Mean oocyst and cyst recoveries by HV filter by sitea
| Organism | Site | Turbidity (NTU) | Spiking concn (organisms/liter) | % Recovery (mean ± SE) | CVc (%) |
|---|---|---|---|---|---|
| Cryptosporidium | Bethany | 11 | 10.1 | 51 ± 0.02 AC | 5.9 |
| Vernalis | 20 | 9.7 | 75 ± 0.06 BCD | 12.8 | |
| Barker Slough | 36 | 9.8 | 55 ± 0.12 ACD | 38.5 | |
| Hood | 99 | 9.4 | 36 ± 0.02 A | 11.8 | |
| Overall avg or CV | 54 | 33.1 | |||
| Giardia | Bethany | 11 | 10.3 | 53 ± 0.06 C | 20.2 |
| Vernalis | 20 | 10.0 | 46 ± 0.03 C | 10.9 | |
| Barker Slough | 36 | 10.3 | 2.6 ± 0.01 D | 86.6 | |
| Hood | 99 | 10.1 | 0.5 ± 0.00 D | 173.2 | |
| Overall avg or CV | 25 | 100.8 |
a
Three replicate samples were used. Data in table are untransformed values. All statistics were determined with arcsine-transformed data.
b
Values followed by the same letter(s) are not significantly different (P < 0.05).
c
CV, coefficient of variation.